From 6a376f396d002b98a46a50b7be128e069525ae48 Mon Sep 17 00:00:00 2001
From: mohammedsheshtar <112146380+mohammedsheshtar@users.noreply.github.com>
Date: Fri, 14 Feb 2025 19:33:12 +0300
Subject: [PATCH 1/4] finished part 1: multiplied a list of numbers by two
 using a lambda function

---
 .idea/misc.xml            | 2 +-
 src/Lambda_Collections.kt | 7 +++++++
 src/Main.kt               | 3 ---
 3 files changed, 8 insertions(+), 4 deletions(-)
 create mode 100644 src/Lambda_Collections.kt
 delete mode 100644 src/Main.kt

diff --git a/.idea/misc.xml b/.idea/misc.xml
index 03f397c..10a22f9 100644
--- a/.idea/misc.xml
+++ b/.idea/misc.xml
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_19" default="true" project-jdk-name="19" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_23" default="true" project-jdk-name="19" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/out" />
   </component>
 </project>
\ No newline at end of file
diff --git a/src/Lambda_Collections.kt b/src/Lambda_Collections.kt
new file mode 100644
index 0000000..0ebd6bd
--- /dev/null
+++ b/src/Lambda_Collections.kt
@@ -0,0 +1,7 @@
+fun main() {
+    // part 1
+    println("Part 1");
+    val nums = listOf(1, 2, 3, 4, 5, 6, 7, 8, 9, 10);
+    println("[*] ${nums.map {it * 2}}");
+
+}
\ No newline at end of file
diff --git a/src/Main.kt b/src/Main.kt
deleted file mode 100644
index a7a5e00..0000000
--- a/src/Main.kt
+++ /dev/null
@@ -1,3 +0,0 @@
-fun main() {
-    println("Hello World!")
-}
\ No newline at end of file

From ebec63ae715d8c4f9fae6f7c744eb5f220b6c44b Mon Sep 17 00:00:00 2001
From: mohammedsheshtar <112146380+mohammedsheshtar@users.noreply.github.com>
Date: Fri, 14 Feb 2025 19:35:50 +0300
Subject: [PATCH 2/4] finished part 2:  generated a name list and filtered it
 to display only names starting with 'A'

---
 src/Lambda_Collections.kt | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/src/Lambda_Collections.kt b/src/Lambda_Collections.kt
index 0ebd6bd..92ab01f 100644
--- a/src/Lambda_Collections.kt
+++ b/src/Lambda_Collections.kt
@@ -4,4 +4,13 @@ fun main() {
     val nums = listOf(1, 2, 3, 4, 5, 6, 7, 8, 9, 10);
     println("[*] ${nums.map {it * 2}}");
 
-}
\ No newline at end of file
+    // part 2
+    println("\nPart 2");
+    val names = mutableListOf<String>("Alice", "Bob", "Amir", "Charlie", "Annie", "David");
+    println("[*] ${filterNames(names) { it.contains("A" )}}");
+
+}
+
+fun filterNames( names: MutableList<String>, filter: (String) -> Boolean ): List<String>{
+    return names.filter(filter);
+}

From 6e2fb8a54072b853f7cfe88ac79daf29e2bb0455 Mon Sep 17 00:00:00 2001
From: mohammedsheshtar <112146380+mohammedsheshtar@users.noreply.github.com>
Date: Fri, 14 Feb 2025 19:39:56 +0300
Subject: [PATCH 3/4] finished part 3: created a list of fruit names and sorted
 it in descending order by name length

---
 src/Lambda_Collections.kt | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/Lambda_Collections.kt b/src/Lambda_Collections.kt
index 92ab01f..53c2135 100644
--- a/src/Lambda_Collections.kt
+++ b/src/Lambda_Collections.kt
@@ -9,6 +9,13 @@ fun main() {
     val names = mutableListOf<String>("Alice", "Bob", "Amir", "Charlie", "Annie", "David");
     println("[*] ${filterNames(names) { it.contains("A" )}}");
 
+    // part 3
+    println("\nPart 3");
+    val fruits = listOf<String>("apple", "banana", "kiwi", "strawberry", "grape");
+    println("[*] ${fruits.sortedByDescending { it.length }}")
+
+
+
 }
 
 fun filterNames( names: MutableList<String>, filter: (String) -> Boolean ): List<String>{

From 8f748732a8aa66657b2761d8e8770f630fa06e07 Mon Sep 17 00:00:00 2001
From: mohammedsheshtar <112146380+mohammedsheshtar@users.noreply.github.com>
Date: Fri, 14 Feb 2025 19:52:04 +0300
Subject: [PATCH 4/4] finished part 5: Added a list of numbers filtered by a
 function that removes evens and squares the rest

---
 src/Lambda_Collections.kt | 28 +++++++++++++++++++++++++---
 1 file changed, 25 insertions(+), 3 deletions(-)

diff --git a/src/Lambda_Collections.kt b/src/Lambda_Collections.kt
index 53c2135..050c57f 100644
--- a/src/Lambda_Collections.kt
+++ b/src/Lambda_Collections.kt
@@ -1,19 +1,30 @@
 fun main() {
     // part 1
-    println("Part 1");
+    println("Part 1:");
     val nums = listOf(1, 2, 3, 4, 5, 6, 7, 8, 9, 10);
     println("[*] ${nums.map {it * 2}}");
 
     // part 2
-    println("\nPart 2");
+    println("\nPart 2:");
     val names = mutableListOf<String>("Alice", "Bob", "Amir", "Charlie", "Annie", "David");
     println("[*] ${filterNames(names) { it.contains("A" )}}");
 
     // part 3
-    println("\nPart 3");
+    println("\nPart 3:");
     val fruits = listOf<String>("apple", "banana", "kiwi", "strawberry", "grape");
     println("[*] ${fruits.sortedByDescending { it.length }}")
 
+    // part 4
+    println("\nPart 4:");
+    val numbers = listOf<Int>(1, 2, 3, 4, 5, 6, 7, 8, 9, 10);
+    println("[*] ${customFilter(numbers) { it > 5 }}");
+    println("[*] ${customFilter(numbers) { it % 2 == 0 }}");
+    println("[*] ${customFilter(numbers) { it % 3 == 0}}");
+
+    // part 5
+    println("\nPart 5:");
+    val numberSquare = listOf(1, 2, 3, 4, 5, 6, 7, 8, 9, 10);
+    println("[*] ${processNumbers(numberSquare, {it % 2 != 0}, {it * it})}");
 
 
 }
@@ -21,3 +32,14 @@ fun main() {
 fun filterNames( names: MutableList<String>, filter: (String) -> Boolean ): List<String>{
     return names.filter(filter);
 }
+
+fun customFilter(numbers: List<Int>, filter: (Int) -> Boolean): List<Int> {
+    return numbers.filter(filter);
+}
+
+fun processNumbers(numbers: List<Int>, filterEven: (Int) -> Boolean, filterSquare: (Int) -> (Int)): List<Int> {
+    var numEven = numbers.filter(filterEven);
+    var numSquare = numEven.map(filterSquare);
+    return numSquare;
+
+}